What does a half pastern marking consist of?

A half pastern marking is defined specifically as a white marking that covers only one half of the pastern joint. This type of marking generally appears on a horse's leg and is significant in identifying and describing individual animals in equestrian contexts. The distinguishing feature of this marking is that it does not encompass the entire pastern, but rather affects just one side, either the front or the back, hence the term "half."

The other options describe different types of markings or positions that do not accurately represent what a half pastern involves. A complete pastern marking would cover the entire joint, while a marking below the coronet indicates a different area entirely. Similarly, a marking extending from the pastern to the knee exceeds the definition of a half pastern, which is limited to modifications on just one side of the pastern itself. Understanding these specifics is crucial for correct identification in the equine industry.